Oil-feed indicator.



features and e 4t teeth, e constitutany selected unit I STATES PATENTomen. I

m xoconnnx, or crncaco, srnnnonnrnn CORPORATION,

ILIIINOIS, ASSIGNOR TO STEWART-WARNER OF OHIOAOO, ILLINOIS, ACORPORATION OF vmGmIA.

\ om-rnnn INDICATOR.

7 1,234,774. Specification of Letters Patent.

. Application filed August as, 1914. Serial no. 858,747.

To all whom it may concern:

Be it lmown that I, HENRY Koconmm a citizen of the United States,residing at C cago, in the county of'Cook and State of Illi- 5 nois,have invented new and useful Improve ments in Oil-Feed Indicators, ofwhich the following is a specification, reference being had to theaccompanying drawings, forming a part thereof.

The purpose of this invention is to provide an instrument adapted toindicate the rate of flow of a fluid-through av conduit and particularlydesigned for use where such flow is of a pulsatin nature." It consistsof the ements described and shown in the drawings as indicated by theclaims.

In the drawings Figure 1 is a front elevation of an instrument embodyingthis invention, certain of 20 the worln'ng parts being shown 1n section.

Fig. 2 isplrincipally a section taken as indicated at t e line 22 onFig. 1,

Fig. 3 is a detail section taken as indicated at the line 3-3 on Fig. 1.

The instrument shown in the drawings isparticularly designed forindicating the rate of'flow of oil in a circulatory lubricating system,especially where circulation is maintained by a pump which is liable tocause more or less pulsation self. The instrument is designed to be con.nected in series-so to speak in the circulatory stem so that all the oilflowing through the system will be passed through the instrument. Forthis purpose it is provided with an intake pipe, 1, and an outlet'pipe,2, be-

tween which communication is afforded through a restricted passage, 3,which is nor mally closed by a piston, 4, acting as a gate valve.' Thepiston, 4, is slidably mounted in the pipe, 1 and is yieldingly he (1toward its lower limit spring, 5,- coiled about its stem, 6. The upperend of the stem is formed with gear a rack meshing with a p' 'on, 7,which is ast on a shaft, 8, carrymg at its opposite end anindicatingneedle, 9. It will be seen that the height to which the piston, 4, willbe raised by t e liquid entering the pipe, 1, depend upon the rate offlow which is being maintained in the circulating system, and thisheight may be indicated in terms of the quantity of liquid flowing Ithrough the instrument in of time by position of the gear, 13,journaledupon a stud,

in the fluid it-' of movement by means of a heavy as comp pressureneedle, 9, upon a properly graduated dial, 10,

That is, to maintain a given rate of flow through the system a certainresure or head of liquid must be maintained by the pump, and thispressure operating upon the plston, 4, will indicate at the dial, 10, asfor example, in terms of gallons rate at which the liquid isbemgcirculated through the system. I

But since such circulation is generally .maintained by means of areciprocating or otherwise intermittent pump, the impulses of the pumpbe transmitted through the l1qu1d causing "a fluctuating pressure andtending to vibrate the indicating needle, 9, thus rendering'it difiicultto ascertain the actual average pressure and the actual rate of flow. Toabsorb the vibration thus introduced into the instrument thereis pro-'vided a special mechanism comprising the balance wheel, 11, journaledloosely upon the shaft, 8, and having rigid with it apinion, 12, meshingwith a considerably larger 14,'fixed in the casing of the instrument.-The gear, 13, also has rigid with it a smaller pinion, 15, meshing witha larger gear, 16, which is fixed as by a pin, any rotation of theshaft, 8, would cause rotation of the balance wheel, 11, at a muchhigher velocity. But because the comparatively heavy balance wheel, 11,from the shaft, 8, and the stem, 6, the pulsations acting through theliquid upon the piston, 4, will notbe suflicient to. overcome theinertia of the balance wheel back-geared in this manner to the piston,andthis inertia will thus operate to absorb these pulsations, preventingfluctuation in the position of the piston, 4, and thus preventingvibration o the needle, 9. The mechanism will not 'prevent theinstrument from responding to an actual variation in the averagepressure of Patented July 31, 1917.

per hour, the

17, to the shaft, 8. Thus is geared up I the fluid but will simplyenable the 'needleto sure, whatever'that may be.

I claim:

1.In aninstru'ment a presure sensitive member and an indicatingmember'operatively connected thereto, a damping device comprising a flywheel relatively ared'with the indicatingmember, and a speed multiplyingoperatively connecting said fly sens tive member for causing comwheelwiththe' paratively rapid movement of said fly wheel during slowmovement of the pressure sensitive member and its connected indicatingmeans.

2. An instrument for the purpose indicated comprising an inlet conduit,an outlet, a port for affording communication between them, a piston inthe inlet conduit positioned to control said port, yielding means tending to hold said piston in position to close the port in opposltion tothe pressure of in-. coming fluid, and relatively light indicating meansoperatively connected to said piston, together with a relatively heavyfly wheel, and speed multiplying gearing connecting it with the pistonadapted to cause comparatively rapid movement of said fly Wheel duringslow movement of the piston and its connected indicating means wherebysaid fly wheel serves as a damper for the piston and said indicatingmeans.

3. An instrument for the purpose indicated comprising an inlet conduit,an outlet,

a port for afi'ording communication between them, a piston in the inletconduit positioned to control said port, yielding means tending to holdsaid piston in position to' close the port in opposition to'the pressureof incoming fluid, a rack gear connected to the piston, a pinionjournaled to mesh with said rack, a shaft for said pinion, a graduateddial, and an indicating needle fixed to said shaft in position totraverse the dial, to-

. gether with a fly wheel loosely mounted on the shaft, and speedmultiplying gearing from the shaft to the fly Wheel whereby the inertiaof said wheel is adapted to resist acceleration of the shaft.

In testimony whereof I have hereunto set my hand at Chicago, Illinois,this 24th day 40 v of August, 1914:. I

HENRY KOCOUREK.

Witnesses:

Rom. N. Bun'ron, EDNA M. MAOINTOSH.

